When 4e was still getting the finishing touches before going to the printers, WotC did an early reveal where they showed off some actual mechanics, not just high-level ideas or setting materials (which they also did with other stuff). One of the things they previewed was a feat called "Golden Wyvern Adept", which included both some mechanical effects I can't recall, and a little bit of relatively mild story/RP context (you have been initiated into a group called the Golden Wyverns, who were a group of spellcasters, possibly Wizards specifically[?], that had certain goals and expectations).
The community response at the time was VEHEMENT OUTRAGE. Fans absolutely skewered the 4e devs for having the unmitigated GALL to presume the story for anyone's character, for forcing in-character actions or affiliations in order to do a particular thing. This taught the devs an early lesson: Don't force anything in RP. Let RP exist completely on its own, so mechanics can be used for whatever flavor and story the player wishes.
And guess what 4e was then pilloried over? (Something I, personally, mocked 4e for because an ex-friend poisoned the well!) Flavorless mechanics that didn't include any story or roleplay elements!!!
Yes. It was very literally the playerbase being completely unpleasable. The very same people who brought out the proverbial torches and pitchforks because of the Golden Wyvern Adept feat "enforced" setting elements or whatever...who then slammed the 4e we eventually got for NOT containing those very elements.
It's one of the most obviously infuriating examples of how 4e literally could not win, an encapsulation of how 4e was subjected to "heads I win, tails you lose" expectations.